Rasalhague (Alpha Ophiuchi)

The brightest star in the constellation Ophiuchus;
its name, which refers to the whole constellation, comes from an Arabic
phrase meaning "the Head of the Serpent Collector." Rasalhague is a giant
A star that has probably recently exhausted
its core hydrogen reserves. It has a faint, very close companion only 0.5"
away, equivalent to 7 AU in real terms, that orbits with a period of 8.7
years.